Abstract
THE Millikan spark1, which is widely used in the far ultra-violet, presents some drawbacks because of the very high fields necessary for its initiation, and the instability of its operation. It is known that, at atmospheric pressure, very long sparks can be obtained with moderate potentials, if they are produced along the surface of a solid (sliding sparks). So far as we know, this spark had not been tried in a good vacuum, and it was not at all sure that it could be operated without an appreciable gas pressure. This communication describes a few results obtained with one type of sliding spark operated at low pressures.
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References
Millikan and Sawyer, Phys. Rev., 12, 167 (1918); Science, 50, 138 (1919). Bombke, “Vakuum spektrocospie” (Leipzig, 1937). Vodar, Progrès récents dans l'étude du spectre U.V. Centre de perfectionnement technique (Cours conférence No. 1116, Nov. 1943).
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VODAR, B., ASTOIN, N. New Source of Light for the Far Ultra-violet. Nature 166, 1029–1030 (1950). https://doi.org/10.1038/1661029b0
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DOI: https://doi.org/10.1038/1661029b0
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